MCQOPTIONS
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MCQOPTIONS
This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Analog Circuits knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In a CS amplifier, given that rds=0.5M and gm=5m -1, the load is 10k , source resistance is 44 k . Calculate the internal amplification factor for the small signal model. |
| A. | 2500 |
| B. | 8100 |
| C. | 9800 |
| D. | 7700 |
| Answer» B. 8100 | |
| 2. |
Which of these has an output which follows input? |
| A. | CS amplifier with a bypass capacitor |
| B. | CD amplifier |
| C. | CG amplifier |
| D. | CS amplifier without a bypass capacitor |
| Answer» C. CG amplifier | |
| 3. |
Which of these is false for a CS amplifier without a bypass capacitor compared to a CS amplifier with a bypass capacitor? |
| A. | Voltage gain magnitude decreases |
| B. | Input resistance remains same |
| C. | The output resistance decreases |
| D. | The output is 180 out of phase with respect to the input applied |
| Answer» D. The output is 180 out of phase with respect to the input applied | |
| 4. |
Which of these is incorrect for a common gate amplifier? |
| A. | It is a current buffer |
| B. | It has output resistance |
| C. | Its input resistance is high |
| D. | It is used as a high-frequency amplifier |
| Answer» D. It is used as a high-frequency amplifier | |
| 5. |
For an RC coupled common source JFET amplifier without bypass capacitor, find the voltage gain if gm = 1m -1, source resistance is 2k , drain resistance is 15k and load is 10k . |
| A. | -2 |
| B. | -2.5 |
| C. | 5 |
| D. | 2 |
| Answer» B. -2.5 | |
| 6. |
Choose the incorrect statement for JFET(s). |
| A. | Maximum transconductance occurs at V<sub>GS</sub>=0 |
| B. | Transconductance decreases linearly with V<sub>GS</sub> |
| C. | Transconductance increases linearly with I<sub>DS</sub> |
| D. | Transconductance does not depend on V<sub>DS</sub> |
| Answer» D. Transconductance does not depend on V<sub>DS</sub> | |
| 7. |
What are the small signal FET parameters? |
| A. | g<sub>m</sub> and r<sub>ds</sub> |
| B. | g<sub>m</sub> and V<sub>gs</sub> |
| C. | V<sub>ds</sub> and r<sub>ds</sub> |
| D. | g<sub>m</sub> |
| Answer» B. g<sub>m</sub> and V<sub>gs</sub> | |